Balance Lab Title: Get familiar with a Centigram Balance Purpose: The purpose of this lab was to use the Centigram Balance and the Electronic Balance to measure the weight in grams of a copper slug, a 100ml Beaker, and an unknown substance. The experiment was to help me get familiar with the weighing of certain materials and the different types of weighing, including direct weighing and weighing by difference. Materials: 2 Copper slugs, 2 100ml Glass Beaker, 2 Centigram Balances, 2 Electronic Balances, 2 unknown weights. Method: First, measure the copper slug using the centigram balance, then put the slug inside of a 100ml Beaker and measure its weight and record the value in the table below. Then measure the Beaker by itself and calculate the weight of the slug by difference.
01.07 Accuracy and Precision: Balance Lab Worksheet Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. Part I: Density of Unknown Liquid Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) Trial 1 36 - 25.5 = 10.5 Trial 2 36.5 - 25.5 = 11 Trial 3 36.9 - 25.5 = 11.4 Calculate the density of the unknown liquid for each trial. (Divide the mass of the liquid calculated above by the volume of the liquid.)
Procedure Centigram balance- direct weighing technique 1) Obtain the centigram balance 2) Add the copper slug to the balance 3) Record the mass of the cooper slug in (g) 4) Retain scale and slug for future use. Centigram balance- weighing by difference 1) Obtain the centigram balance 2) Obtain a 100mL beaker. 3) Put the beaker on the scale and record the mass in (g) 4) Transfer the copper slug from the first part of the experiment to the beaker 5) Weight and record the mass of the beaker & slug. 6) Subtract the mass of the beaker from the mass of the beaker & slug. 7) Record the mass of the copper slug in (g) 8) Retain the beaker and slug for future use.
SCH3U0 Name: ______________________________ Unit: Quantities in Chemical Reactions ______________________________ Determining the Chemical Formula of a Hydrate Purpose: To determine the molecular formula of a copper (II) sulfate hydrate Procedure: You must develop a procedure to determine the molecular formula of, and the mass percent of water in, a copper (II) sulfate hydrate. The following clues should help you to figure out your procedure; * CuSO4•H2O(s) is blue * CuSO4(s) is white * The boiling point of water is 100ºC While writing your procedure please consider the following questions; * What are the appropriate steps required to determine the amount of water in the hydrate? * What quantities
Adam Workman Lab, Week #1 Balance Lab Introduction The purpose of the Balance Lab experiment was to become familiar with the ChemLab software and to become familiar with different mass measurement methods. During the experiment, three different mass measurement methods were used to determine the mass of copper slugs as well as the mass of two different unknown weights: the direct weight method, the weighing by difference method, and the average mass method using both a centigram balance and an electronic balance. Using the centigram balance, the weight of a single copper slug, in grams, is determined using both the direct weight and weight by difference methods. Likewise, using the electronic balance, the same copper slug is measured by direct weight and weighing by difference methods. Using the same electronic balance, the average mass of five copper slugs, in grams, will be determined.
Lab Report Determination of Density of Aluminum January 25, 2011 Tinisha Hallback (Chem 1211L,Tues. 7:00-9:15pm) Partners: Henrietta Mofoke & Shante Blackburn Objective: To determine the Density of aluminum by water displacement and geometric formulas. Procedure: The relationship between the mass of an object and its volume is called density. The mass and volume of aluminum was determined. The density was calculated by dividing the mass of the piece aluminum by its volume.
Lab Partner: Aidan McLaughlin Determination of the Density of a Metal Cylinder PURPOSE: a.) To make length and mass measurements on a metal cylinder b.) To calculate volume and density of a metal cylinder c.) To use a physical property in order to make an identification of a metal cylinder BACKGROUND THEORY: The two mathematical equations used to find the density of the metal cylinders were the equations for volume and density. The true value of a brass cylinder is 9.55 g/cm^3. In order to find out the density of the three brass cylinders, the equation Mass divided by Volume was used.
Sarah Whelan, Danielle Zahren, Blake Ulrich AP Physics 11-2 Mr. Shoppe 6 September 2014 Density of a Solid Objectives: The purpose of this lab was to practice measuring, graphing, and calculating with proper significant digits. Also, we conducted this experiment to determine the density of an unknown object, graphically. Background: Prior to completing this experiment, I knew that density was defined as the degree of compactness of an object. I also knew that density was measured inmassvolume. Therefore, I knew that the unit of density was gmL or gcm3.
Other than the physical properties of the substance, the measurements and mass can be used to identify the substance as well. In the cube section of this lab, the side length and mass of the cubical solid will be measured; in the cylinder section of this lab, the diameter, height and mass of the metal cylinder will be measured; in the calcium carbonate chips section, the mass of the chips, the initial volume of water, and the volume of water plus chips will be measured; in the liquid section, the mass of the graduated cylinder and the mass of cylinder plus water will be measured. Several formulas will be used in this lab in order to find the density of the different substances: Volume of a cube = length * width * height V = L * W * H Volume of a cylinder = (π * D2) / 4 * h or πr2h Percent error is a measure of how inaccurate a measurement is. Calculating the percent error is important because the percent error enables whether the experiment was successful or not.
The Empirical Formula of an Oxide, Purpose: The purpose of this lab was to determine the empirical formula of magnesium oxide. To do this, we measured the weight of the magnesium before the reaction with oxygen, and then measure it after it had bonded with the oxygen. After the mass of the items were collected, the data was calculated in empirical formula. Background: The empirical formula of a compound is the whole number ratio of the elements in a compound. For example, the empirical formula of water is H2O meaning for every 1 O atom there are 2 H atoms.